Pipe-coupling.



. UNITED STATES I Patented August 23, 1904.

PATENT OEEICE.

oscAR EISENHUTH, OF DETRoIT, MICHIGAN, ASSIGNOR TO AMERICAN PIPE & IIosEoUPLERCoMP NY, OF DETROIT, MICHIGAN, CoR- PORATION OF MICHIGAN.

PIPE-COUPLING.

SPECIFICATION forming part of Letters Patent N 0. 768,359,'dated August23, 1904.

Application filed February 3,1903. Serial No. 141,688. (No model.)

To all whom, it may concern: I

Be it known that I, Own: EISENHUTH, a

citizen of the United States, residing at Detroit, in the county ofWayne and State of Michigan, have invented certain new andusefulImprovements in Pipe-Oouplings,of which the following is aspecification, reference being bad therein to the accompanying drawings.

The invention relates to improvements in pipe-couplings; and it consistsin the construction of the joint in which a packing is expanded tomakeit tight and means are provided to prevent the parts from separating,but which upon increased internal pressure tends to further tighten thejoint in proportion to the increase in pressure, all as more fullyhereinafter described, and particularly pointed out in the claims. 1

In the drawings, Figure l is a sideelevation of my improved coupling,showing the parts engaged. Fig. 2 is a vertical central longitudinalsection therethrough. Fig. 3 is a perspective view of the two partsdetached. Fig. 4 is a detail illustrating the means of frictionallylocking the cam and the male member to prevent accidental disengagementof the parts.

A represents the tubular male member,

which is in the shape of a tube, having in this case the corrugations aat one end, to which a hose may be attached. On the inner end of thistube is a shoulder, preferably in the form of a nut B, adjustable by ascrew-threaded engagement with the end portion of the memher A, asshown.

Sleeved on the male member is the packingring 0, preferably of rubber.At the outer end of this packing-ring is a ring D, bearing at its innerend upon the outer end of the packing-ring G. On the ring D are twoinclines or cams E, against which the lugs F on the male member bear.This ringD is also adapted to be detachably locked to the female memberG by means of hooks H on the-ring engaging the flange I thereon, saidflange having entering slots J, as shown in Figs. 1 and 3.

The female member G is in the shape of a tube or barrel, into which thepacked end of the male member engages and loosely fits, and this barrelpreferably has an integral nipple K, to which a hose maybe attached.

-The parts being thus constructed, they are used as follows: Theoperator engages the packing on the male member into the barrel of thefemale member, as shown in Fig. 2. .At the same time the hooks enter theslots J. A partial rotation of the parts brings the flange I into. thehooks, as shown in Figs. 1 and 2. A rotation of the male member, thering D being held from rotation, or turning the ring D, the couplingmembers being held, causes the lugs F to ride up the inclines or cams,moving the male member slightly'outward in the female member'andcompressing and expanding the packing between the shoulder or nut B andthe ring D, such expansion causing it to be pressed against the insidewalls male member will tend to force it out, thereby increasing theexpansion of the packing and making the joint tighter just in proportionas the pressure increases, while-the hooks on the ring hold the partstogether so they cannot be separated. except by such a rotation as willbring the hooks H and slots J into registration.

To prevent the accidental rotation of the two parts, I preferably makeslight notches L, Fig. 4," in the cams, into which the lugs F may engagewhen the packing is compressed.

It will be observed that the joint is made solely by the expansiblepacking and that the greater the pressure within the tighter the joint.

What I claim as my invention is 1. In a pipe-coupling, the combinationofa male member, terminating in a nipple, ashoulder at the end of thenipple, a ring on the nipple at the other end, an elastic packing-ringon the nipple between the shoulder and ring, a cam for compressing andthus expanding the packing between the ring and shoulder, a femalemember'into which the nipple is adapted to fit and in which whenexpanded the packing is adapted to it tightly, and a detachable lockingconnection between the male and female members preventing longitudinaldisengagement, but permitting a slight longitudinal movement of the malemember by further compressing the packing thereon.

2. In a pipe-coupling, a tubular male member, a packing-ring on thetube, a ring loose on the tube, a cam for moving the ring longitudinallyon the tube to compress and expand the packing-ring laterally, a femalemember to receive the male member and be engaged by said packing-ring,and a hook connection between the ring in the male member and the femalemember, for the purpose described.

3. In a pipe-coupling, a tubular male memher, having an expansiblepacking, a tubular female member into which the male member enters andwith which the packing thereof engages, a ring loosely embracing themale member, a cam on the ring, and a detachable hook connection betweenthe ring and female member, whereby endwise movement of the male membertending to separate the two members by internal pressure acts to expandthe packing and make a tighter joint the greater the pressure.

L. In a pipe-coupling, the combination of a tubular female member, atubular male member, an expansible packing thereon fittinginto thefemale member, a ring loosely embracing the male member and contactingthe upper end of the packing, cams on the ring, hooks on the ring,bearings on the female member with which said hooks detachabl y engage,and hearings on the male member bearing against the cams on the ring,the parts being combined so that when the parts are engaged a rotationof the male member on the ring will move said member longitudinally andcompress the packing, and whereby internal pressure will tend to furthermove said member to increase the expanding effect of the packing as thepressure increases.

5. In a'pipe-coupling, the combination of a female member, amale member,an expansible packing for the male member, a ring loosely engaging themale member for contacting the packing with the female member, acam onthe ring, means for engaging the cam to compress the packing, and a hookon the ring adapted to engage the female member for forming a detachableconnection between the male and female members.

6. In a pipe-coupling, the combination of a female member, a malemember, an expansible packing for the male member, a ring looselyengaging the male member for comvacting the packing with the femalemember, cams on the ring, projections on the male member for engagingthe cams to compress the packing, and a hook on the ring adapted toengage the female member for forminga detachable connection between themale and female HlOmbOlH.

7. In a pipe-coupling, the combination of a female member, of a malemember, an expansible packing for the male member, a ring looselyengaging the male member for contacting the packing with the femalemember, cams on the ring, projections on the male member for engagingthe cams to compress the packings, means on the cams for limiting themovement of the projections on the male member, and a hook on the ringadapted to engage the female member for forming a detachable connectionbetween the male and the female member.

8. In a pipe-coupling, the combination of a female member, of a malemember, an expansible packing for the male member, a ring looselyengaging the male member for contacting the packing with the femalemember, cams on the ring, projections on the male member for engagingthe cams to compress the packing, means on the cams for limiting themovement of the projections on the male member, hooks on the ring, andbearings on the female member arranged to be engaged by the hooks todetachably connect the male and female members.

9. In a pipe-coupling, a tubular male member, a packing-ring on thetube, a ring loosely mounted on the tube, means for moving the ringlongitudinally on the tube to compress the packing, a female member toreceive the male member, and to be engaged by said paeking-ring, andhooks on the ring adapted to engage hearings on the female member todetachably connect the two sections.

10. In a pipe-coupling, a male member, a packing on the male member, aring loosely mounted on the male member, means for moving the ring tocompress the packing, a female member adapted to receive the male memberand to be engaged by said packing, and a hook on the ring arranged toengage the female member to detachably connect the two sections.

In testimony whereof I. afiix my signature in presence of two witnesses.

OSCAR EISENIIU'II l.

\Vitnesses:

M. B. 0 Doc 1 nnrrv, J. BARRY.

